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Discovery of a Be/X-ray pulsar binary and associated supernova remnant in thewing of the Small Magellanic Cloud

Hénault-Brunet, V, Oskinova, LM, Guerrero, MA, Sun, W, Chu, YH, Evans, CJ, Gallagher, IS, Gruendl, RA and Reyes-Iturbide, J (2012) Discovery of a Be/X-ray pulsar binary and associated supernova remnant in thewing of the Small Magellanic Cloud Monthly Notices of the Royal Astronomical Society: Letters, 420 (1).

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Abstract

We report on a new Be/X-ray pulsar binary located in the Wing of the Small Magellanic Cloud (SMC). The strong pulsed X-ray source was discovered with the Chandra and XMM- Newton X-ray observatories. The X-ray pulse period of 1062 s is consistently determined from both Chandra and XMM-Newton observations, revealing one of the slowest rotating X-ray pulsars known in the SMC. The optical counterpart of the X-ray source is the emission-line star 2dFS 3831. Its B0-0.5(III)e+ spectral type is determined from VLT-FLAMES and 2dF optical spectroscopy, establishing the system as a Be/X-ray binary (Be-XRB). The hard X-ray spectrum is well fitted by a power law with additional thermal and blackbody components, the latter reminiscent of persistent Be-XRBs. This system is the first evidence of a recent supernova in the low-density surroundings of NGC602. We detect a shell nebula around 2dFS 3831 in Hα and [O III] images and conclude that it is most likely a supernova remnant. If it is linked to the supernova explosion that created this new X-ray pulsar, its kinematic age of (2-4) × 10 4 yr provides a constraint on the age of the pulsar. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.

Item Type: Article
Authors :
NameEmailORCID
Hénault-Brunet, VUNSPECIFIEDUNSPECIFIED
Oskinova, LMUNSPECIFIEDUNSPECIFIED
Guerrero, MAUNSPECIFIEDUNSPECIFIED
Sun, WUNSPECIFIEDUNSPECIFIED
Chu, YHUNSPECIFIEDUNSPECIFIED
Evans, CJUNSPECIFIEDUNSPECIFIED
Gallagher, ISUNSPECIFIEDUNSPECIFIED
Gruendl, RAUNSPECIFIEDUNSPECIFIED
Reyes-Iturbide, JUNSPECIFIEDUNSPECIFIED
Date : 1 February 2012
Identification Number : https://doi.org/10.1111/j.1745-3933.2011.01183.x
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:54
Last Modified : 17 May 2017 12:54
URI: http://epubs.surrey.ac.uk/id/eprint/837174

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